package com.atguigu.gulimall.cart.controller;

import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.gulimall.cart.interceptor.CartInterceptor;
import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.CartItem;
import com.atguigu.gulimall.cart.vo.UserInfoTo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Controller
public class CartController {

    @Autowired
    private CartService cartService;

    /**
     * 去往购物车页面的请求
     *      浏览器有一个cookie，user-key；标识用户身份，一个月后过期；
     *      如果第一次使用jd的购物车功能，都会给一个临时的用户身份；
     *      浏览器以后保存，每次访问都会带上这个cookie；
     *
     * 如果登录了：session有
     * 如果没登录：按照cookie里面带来user-key来做
     * 第一次：发现如果没有临时用户，就创建一个临时用户
     * @return
     */
    @GetMapping("/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        // 1、快速得到用户信息   id，user-key
        Cart cart = this.cartService.getCart();

        model.addAttribute("cart", cart);

        return "cartList";
    }

    /**
     * 添加商品到购物车
     * @return
     */
    @GetMapping("/addToCart")
    public String addToCart(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num,
                            RedirectAttributes redirectAttributes) throws ExecutionException, InterruptedException {

        this.cartService.addToCart(skuId, num);

        redirectAttributes.addAttribute("skuId", skuId);
        return "redirect:http://cart.gulimall.com/addToCartSuccess.html";
    }

    /**
     * 跳转到成功页
     * @param skuId
     * @param model
     * @return
     */
    @GetMapping("/addToCartSuccess.html")
    public String addToCartSuccessPage(@RequestParam("skuId") Long skuId, Model model) {
        // 重定向到成功页面。再次查询购物车数据即可
        CartItem item = this.cartService.getCartItem(skuId);
        model.addAttribute("item", item);

        return "success";
    }

    @GetMapping("/checkItem")
    public String checkItem(@RequestParam("skuId") Long skuId, @RequestParam("check") Integer check) {

        this.cartService.checkItem(skuId, check);

        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/countItem")
    public String countItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {

        this.cartService.changeItemCount(skuId, num);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {

        this.cartService.deleteItem(skuId);
        return "redirect:http://cart.gulimall.com/cart.html";
    }

    @GetMapping("/currentUserCartItems")
    @ResponseBody
    public List<CartItem> getCurrentUserCartItems() {
        return this.cartService.getUserCartItems();
    }
}
